video door phone 4'' flat colorful CRT monitor. CMOS camera,handset,audio and video communication. video door phone1. 4'' flat colorful CRT monitor.2. CMOS camera,handset,audio and video communication.3. unlock, intercom, call other monitors, monitor outside4. 6 LED lights,External power adaptor.5. Connection: 4 wire (Up to 5 monitors)Technical Specification:Camera StationItem No.311CCamera1/ ...